Auxiliary hot-water and heating system



n. A. BRUNETT.

AUXILIARY HOT WATER AND HEATING SYSTEM.

APPLICATION FILED FEB. I6 I920. l,%02,045 Patented Jan. 3, 1922.

DEWITT A.. BRUNETT, 0F MINNEAPOLIS, MINNESOTA.

'UXILIARY HOT-WATER AND HEATING SYSTEM.

Specification of Letters Patent.

Patented Jan. 3,1922.,

vApplication led February 16, 1920. Serial No. 358,814.

full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved auxiliary heater for use in hot water and steam heating systems, andr by the use of which, the hot gases that are usually passed to the chimney or stack, and hence wasted, are utilized in the heating of hot water or generation of steam in the heating system.

Generally stated, the invention consists of the novel devices and combination of devices hereinafter described and defined in the claims. f

The invention is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views. l I

Referring to the drawings:

Fig. 1 is a view partly in elevation and partly in vertical section on the line 1-1 of Flg. 2, illustrating my invention as applied in a hot water heating system; and

Fi 2 is a horizontal section on the irregu ar line 2 2 of Fig. 1.

The numeral 3 indicates a hot water heater and the numeral 4 one of the several radiators, such as used in hot water heating systems. The numeral 5 indicates a hot water delivery pipe that extends from top of the heater 3 to the radiator 4. The numeral 6 indicates the customary smoke pipe that extends from the combustion chamber l of the heater 3. The numeral 7 indicates a chamber 10. Within the inner shell 9, there'A is formed a hot gas chamber 11, and this chamber, as shown, extends into the lower portion of the outer shell 8. The smoke pipe 6, from the heater 3, extends through the shells 8 and 9 .at one side and opens into one side of the hot gas chamber 11. An upper secondary smoke pipe 12 leads outward from the upper portion of the said chamber 11, through both shells 8 and 9, and opens into the smoke stack 7; and a similar but lower secondary smoke pipe 13 leads outward from the lower portion of said chamber 11, and also opens Iinto the smoke pipe 7. Dampers 12a and 13a, re-

spectively, in the smoke pipes 12 and 13, adapt the same to beindependently opened and closed..

Located within the hot gas chamber 11 is an auxiliary heater, preferably made up of a plurality of connected hollow sections`14 which may be of radiator construction, and these sections are connected at their upper and lower ends, and at their lower ends are Y also connected at 15 to the lower portion of the hot water chamber 10. A cold water return pipe 16 extends from the radiator 4 to the upper portion of the hot water chamber 10, and a secondary return pipe 17 extends from the upper portion of the auxiliary heater 14, back to the lower portion of the hot water chamber of the main heater 3.

The operation of the auxiliary heater inv place in the main heater 3 andthe hot water will rise through the pipe 5 to the radiator or radiators 4, while the relatively cold water from the radiator orradiators will be returned through pipe 16, thence through water chamber 10, thence through auxiliary heater 14, and thence through pipe 17 back f to the main heater 3. l

The hot gases from the heater 3 will pass into hot air chamber 11 of the auxiliary heater and will come into contact with all of the exterior surface of the auxiliary heater 14, and from thence, will pass to the smoke stack, either through secondary smoke pipe 12 or secondary smoke pipe 13. In starting a fire, damper 12a will be open, and damper 13a closed, but after the fire has been started, damper 13a will be open and damper 12 will be closed, so that under ordinary conditions, the only escape of the hot gases from hot air chamber 11 to the the lower secondary smoke pipe 13.

Hence, as is evident, the cold water returning from the radiator or radiators 4, in passing through the auxiliary heater, will be heated to a considerable extent, so that lsmoke stack or chimney 7 will be through'4 the cold water is returned directly` in its action, as well as more economical in the use of fuel.

When the auxiliary heater is applied in a steam heating system the action will be very similar to that above described, but it will then be condensed steam or cooled water vapor that will be passed through the auxiliar heater.

bviously, the auxiliary heater may be very easily and cheaply installed in connection with hot water and steam heating systems already in use, as well as in 'installatiorm.

What I claim is:

1. A water heater having in combination a casing, a second casing surrounding said casing and spaced therefrom to form a Y water chamber, a water inlet means at the top of said chamber, a hollow heated member disposed in said first mentioned casing communicating with said water chamber at the bottom thereof, a water outlet means at the top of said heated member, and means for passing a heating medium-through said first mentioned casing.

2. A water heater having in combination a casing, a second casing surrounding said casing at the sides and top and spaced therefrom to form therewith a water chamber, a water inlet means at the top of said chamber, a hollow heated member disposed in said first mentioned casing communicating with said water chamber at the bottom thereof, a water outlet means at the top of said heated member, a conduit for a heating medium communicating with one Side of said first mentioned casing, and upper and lower damper-equipped outlet conduits at the other side of Said casing. l

3. The structure set forth in claim l, said hollow heated member comprising a plurality of connected hollow sections.

4. A water heater having in combination a casing, a second casing surrounding said casing at the side and `top and forming therewith a water chamber, a water inlet means at the top of said chamber, a water outlet means connecting to the bottom of said water chamber and passing out of said inner casing at the top thereof, a conduit for a heating medium connected to the inside of said rst mentioned casing at one side thereof, and upper and lower outlet conduits extendin from said casing at the other side thereo 5. A fluid heater having in combination a casing, a second casing outside of said casing and spaced therefrom to form therewith a fluid chamber, a hollow heating member disposed in said first mentioned casing, and spaced from the walls thereof, means for circulating a fluid through said heating member, and means for passing a heated medium through said second mentioned casing about said heating member.

n testimony whereof I affix my signature in presence of two witnesses.

DEWITT A. BRUNETT.

Witnesses:

B. G. BAUMANN, HARRY lD. KILGORE. 

